PHP image processing class (with examples)

Share an image processing class implemented in PHP, which can set text watermarks and image watermarks. Friends in need can refer to it.

This section shares an image processing class that simply implements text watermarks and image watermarks. It is a small example for learning PHP image operations.

Code:

<?php 
class ImageModifier { 
/** 
 *  实现在图片上保存文本信息 
 * 
 *  default is array() 
 * 
 *  @access private 
 */ 
var $aTextData = array(); 

/** 
 *  保存文本信息到图片上 
 * 
 *  default is array() 
 * 
 *  @access private 
 */ 
var $aImageData = array(); 

/** 
 *  imagick的资源标识符
 * 
 *  default is FALSE 
 * 
 *  @access private 
 */ 
var $image = ""; 

/** 
 *  错误消息级别 
 * 
 *  default is 0 
 * 
 *  @varinteger 
 */ 
var $sError = 0; 


   /** 
 *  构造函数
 *   
 *  @param  string  $tplImage   template image 
 *  @access private 
 */ 
public function __construct($tplImage) { 

// Check Imagick class exist or not if not show error. 
if (!class_exists("Imagick", false)) { 
exit("Unable to load class: Imagick\n. Imagick Image Library Missing."); 
} 
// create a object of Imagick template image 
$this->image = new Imagick($tplImage); 
} 

/** 
 *  设置文本属性  
 * 
 *  @param  string  $sText  text to print on the image (i.e. Buy 1 Get 1 Free ) 
 *  @param  integer  $x text to print from x codinates   
 *  @param  integer  $y text to print from y codinates 
 *  @param  integer  $font  text size for printing   
 *  @param  string  $color  text color for print   
 *  @param  integer  $text_anglerotate text from 0-360   
 *  @param  string  $font_style installed font name and path (i.e /usr/share/fonts/liberation/LiberationSans-Italic.ttf) 
 *  @Creating an array of text properties 
 */ 

public function setText($sText, $x = 0, $y = 0, $font = 12, $color = 'black', $text_angle = 0, $font_style = './LiberationSans-Italic.ttf') { 
$this->aTextData[] = array("text"=>$sText, "font_color"=>$color, "font_size"=>$font,"x"=>$x,"y"=>$y, "font_style"=>$font_style, 
"text_angle"=>$text_angle); 
} 

/** 
 *  设置图片属性
 * 
 *  @param  string  $sImage text to print on the image (i.e. /home/httpd/images/brand.jpg ) 
 *  @param  integer  $x text to print from x codinates   
 *  @param  integer  $y text to print from y codinates 
 *  @param  integer  $text_anglerotate text from 0-180   
 *  @Creating an array of image properties 
 */ 

public function setImage($sImage, $x = 0, $y = 0, $angle=0) { 
$this->aImageData[] = array("image"=>$sImage, "x"=>$x, "y"=>$y, "angle"=>$angle); 
} 

/** 
 *  从文字和图片属性生成最终图像 
 * 
 *  @param  string  $sImage Output image Name 
 *  @return boolean returns TRUE on success and FALSE upon failure 
 */ 

public function generateImage($sImage) { 
foreach ($this->aImageData as $aImageValue) { 
if (!trim($aImageValue["image"])) { 
$sError = 1; 
break; 
} 
$oImg = new Imagick($aImageValue["image"]); 
$oImg->rotateImage("transparent", $aImageValue["angle"]); 
$this->image->compositeImage($oImg, $oImg->getImageCompose(), $aImageValue["x"], $aImageValue["y"]); 
unset($oImg); 
} 
foreach ($this->aTextData as $aTextValue){ 
if (!trim($aTextValue['text'])) { 
$sError = 2; 
break; 
} 
$oDraw = new ImagickDraw(); 
$oDraw->setFont($aTextValue['font_style']); 
$oDraw->setFontSize($aTextValue['font_size']); 
$oDraw->setFillColor($aTextValue['font_color']); 
$this->image->annotateImage($oDraw, $aTextValue['x'], $aTextValue['y'], $aTextValue['text_angle'], $aTextValue['text']); 
unset($oDraw); 
} 
if ($sError == 1) { 
exit("Unable to generate Image. Check \"setImage\" Properties"); 
}elseif ($sError == 2) { 
exit("Unable to generate Image. Check \"setText\" Properties"); 
} 
$this->image->setImageFormat("jpg"); 
return $this->image->writeImage($sImage); 
} 
} 
?>

2, calling example:

<?php 
//调用类文件
require_once "ImageModifier.class.php"; 

//示例
$oImageMagick = new ImageModifier('template.jpg'); // Image Template on which you have to manupulate 
$oImageMagick->setText("This is one", 350, 20, 22, "red"); 
$oImageMagick->setText("This is Two", 50, 50, 25, "blue","50"); 

$oImageMagick->setImage("brand.jpg", 160, 90, 0); 
$oImageMagick->setImage("tata.jpg", 160, 20); 

$newImagename = "mynewImage.jpg"; 
$oImageMagick->generateImage($newImagename); 
?>